Iridium(III) iodide

Iridium(III) iodide is an iodide of iridium, with the chemical formula of IrI3.

Iridium(III) iodide
Names
Other names
Iridium triiodide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/3HI.Ir/h3*1H;/q;;;+3/p-3
    Key: WUHYYTYYHCHUID-UHFFFAOYSA-K
  • [I-].[I-].[I-].[Ir+3]
  • dihydrate: O.O.[I-].[I-].[I-].[Ir+3]
  • trihydrate: O.O.O.[I-].[I-].[I-].[Ir+3]
Properties
I3Ir
Molar mass 572.930 g·mol−1
Appearance dark brown solid[1]
Density 7.4 g·cm−3[1]
Solubility insoluble in water and benzene[1]
Related compounds
Other anions
 iridium(III) hydroxide
iridium(III) chloride
Iridium(III) bromide
Other cations
 Rhodium(III) iodide
Related compounds
 Iridium(IV) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

Iridium(III) iodide can be obtained by reducing iridium(IV) iodide with hydrogen at 210 °C.[2] It can also be formed by the reaction of iridium dioxide[3] or iridium(III) hydroxide with hydrogen iodide.[4]

Chemical properties

Iridium(III) iodide is a dark brown solid that is insoluble in water.[1] It is monoclinic like chromium trichloride.[5][6] Its trihydrate is yellow and can be dehydrated into the dihydrate or anhydrous form on heating. Iridium(III) iodide also has a monohydrate.[3][7]

References
  1. Dale L. Perry (2016). Handbook of Inorganic Compounds, Second Edition. CRC Press. p. 523. ISBN 978-1-4398-1462-8.
  2. Malatesia, Lamberto (March 31, 1961). PART I - STUDIES ON RHENIUM COORDINATION COMPOUNDS: HEXAISOCYANIDERHENIUM(I) SALTS; PART il - STUDIES ON IRIDIUM COMPOUNDS: ISOCYANIDE DERIVATIVES OF IRIDIUM, CARBONYL DERIVATIVES OF IRIDIUM IODIDES (PDF) (Report). Archived from the original (PDF) on 2018-10-30.
  3. William Pettit Griffith (1967). The chemistry of the rarer platinum metals (Os, Ru, Ir, and Rh). Interscience Publishers. p. 241.
  4. Raymond Eller Kirk; Donald Frederick Othmer; Herman Francis Mark (1963–1970). WHICH VOLUME?. Encyclopedia of Chemical Technology: Editorial board: Herman F. Mark, chairman, John J. McKetta, Jr. [and] Donald F. Othmer. Interscience Publishers. p. 871. OCLC 2519460.
  5. R. Blachnik (2013). Taschenbuch für Chemiker und Physiker Band 3: Elemente, anorganische Verbindungen und Materialien, Minerale. Springer-Verlag. p. 494. ISBN 978-3-642-58842-6.
  6. Brodersen, K. (February 1968). "Structure of β-RuCl3, RuI3, IrBr3, and IrI3". Angewandte Chemie International Edition in English. 7 (2): 148. doi:10.1002/anie.196801481. ISSN 0570-0833.
  7. H. J. Kandiner (2013). Iridium. Springer-Verlag. ISBN 978-3-662-12128-3.
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